BMW was never known for the best sounding exhaust notes. Besides the S85, nothing else from BMW comes close. Yea, the S65 is loud, but what V8 isn't. This car will perform much better than an other M. The exhaust can be modified.

ROFL! The S65 is the best sounding V8 outside Maranello my friend...fitted with a proper exhaust.

Akrapovic will clean this up and make it sound bassy and powerful. They are making the optional M exhaust right? We need to hear that.

When I swapped the front section on my S65, it sounded like a Civic at low RPM at light load with the stock rear section. Added the Akra and it sounds amazing now and still has a staccato at higher RPMs.

sounds awful for an inline 6, but im willing to bet that tinny and insubstantial sound is the result of the placement of high-flow metallic primary cats. Its like the USDM S54; once you remove the primaries and install headers, that buzzy/thin/boring sounding exhaust note turns into a high winding shriek.

sounds awful for an inline 6, but im willing to bet that tinny and insubstantial sound is the result of the placement of high-flow metallic primary cats. Its like the USDM S54; once you remove the primaries and install headers, that buzzy/thin/boring sounding exhaust note turns into a high winding shriek.

Probably....but why does it FART on shifts!? X6M does this also...I don't get it.

While it is spectacularly powerful and endows the M4 coupé to previously unattained levels of acceleration, the new engine lacks engagement and sounds disappointingly flat at certain points in the rev range. It also fails to match the sheer response of the engine it succeeds.